Article
Nanoscience & Nanotechnology
Nabila Tanjeem, William H. Wilkin, Daniel A. Beller, Chris H. Rycroft, Vinothan N. Manoharan
Summary: This study investigates the growth of 2D crystals of colloidal nanoparticles on cylindrical substrates using a combination of experiment and simulation. The cylindrical geometry influences how the crystals grow, resulting in kinked line slips containing partial vacancies. The closure constraint of the cylinder leads to frustrated crystal growth, impacting the formation of structures such as chiral optical nanomaterials.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ido Levin, Emmanuel Siefert, Eran Sharon, Cy Maor
Summary: Geometrically frustrated elastic ribbons exhibit significant shape transitions depending on the relationship between their width and thickness, with the existence and scaling of these transitions strongly dependent on the system being considered. By using an asymptotic approach and treating width as a small parameter, the leading energy terms causing frustration were identified, allowing for the prediction of the shape transition's existence and scaling. Five different types of frustrated ribbons were studied in detail, showing sharp or moderate shape transitions at critical widths, with the approach's predictions matching experimental results from various geometric settings.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Multidisciplinary Sciences
Xiaoyu Zhang, Ayhan Duzgun, Yuyang Lao, Shayaan Subzwari, Nicholas S. Bingham, Joseph Sklenar, Hilal Saglam, Justin Ramberger, Joseph T. Batley, Justin D. Watts, Daniel Bromley, Rajesh Chopdekar, Liam O'Brien, Chris Leighton, Cristiano Nisoli, Peter Schiffer
Summary: The study demonstrates that Boltzmann-distributed strings of local excitations can describe the topological physics of the Santa Fe geometry, which shows strong correlations and applies to classical systems. Experimental results show that the string length follows a simple Boltzmann distribution with an energy scale related to magnetic interactions and consistent with theoretical predictions.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Ankit Dixit, Dip Prakash Samajdar, Navjeet Bagga
Summary: This article demonstrates the impact of nanowire geometry on the performance of GaAs1-xSbx transistors. Triangular nanowires (TNW) show superior subthreshold slope, DIBL, and OFF current compared to circular or rectangular nanowires. Additionally, TNW exhibits higher noise figure than CNW (RNW) and the impact of temperature on device metrics was investigated, showing potential for high-performance applications through optimized nanowire geometry.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Nanoscience & Nanotechnology
Nils Ulrich, Michelle Schaefer, Melina Roemer, Sascha Dominic Straub, Siyuan Zhang, Joachim Broetz, Christina Trautmann, Christina Scheu, Bastian J. M. Etzold, Maria Eugenia Toimil-Molares
Summary: Three-dimensional and highly interconnected copper nanowire networks were prepared by electro-deposition in etched ion track polymer templates and used as catalysts for electrochemical CO2 reduction in an aqueous electrolyte to produce hydrocarbons and alcohols. The specific surface area of the nanowire networks could be adjusted by controlling the wire length, diameter, and number density, ranging from 70 cm2 to 300 cm2 per cm2 sample area. The conversion efficiency and selectivity of CO2 reduction were studied as a function of the applied potential, and the stability of the nanowire networks during CO2 reduction was confirmed.
ACS APPLIED NANO MATERIALS
(2023)
Article
Multidisciplinary Sciences
Younsik Kim, Min-Seok Kim, Dongwook Kim, Minjae Kim, Minsoo Kim, Cheng-Maw Cheng, Joonyoung Choi, Saegyeol Jung, Donghui Lu, Jong Hyuk Kim, Soohyun Cho, Dongjoon Song, Dongjin Oh, Li Yu, Young Jai Choi, Hyeong-Do Kim, Jung Hoon Han, Younjung Jo, Ji Hoon Shim, Jungpil Seo, Soonsang Huh, Changyoung Kim
Summary: The Kondo hybridization in FeTe is observed, and its role in the mechanism of magnetic order is discussed.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Mingxi Yue, Zi Cai
Summary: Studies of systems far from equilibrium are exploring new phases of matter. This study examines a driven-dissipative frustrated spin system, proposing an out-of-equilibrium nonmagnetic phase where spins do not order but adhere to the ice rule in space and establish longrange crystalline order in time. Experimental realizations of the model are discussed.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Manzhang Xu, Bijun Tang, Yuhao Lu, Chao Zhu, Qianbo Lu, Lu Zheng, Jingyu Zhang, Nannan Han, Weidong Fang, Yuxi Guo, Jun Di, Pin Song, Yongmin He, Lixing Kang, Zhiyong Zhang, Wu Zhao, Cuntai Guan, Xuewen Wang, Zheng Liu
Summary: The study demonstrates the application of supervised machine learning in guiding the synthesis of high-quality quasi-1D WTe2 nanoribbons through chemical vapor deposition, uncovering the profound influence of H2 gas flow rate and source ratio on the formation and morphology of WTe2. The proposed growth mechanism of 1T' few-layered WTe2 nanoribbons offers new insights for the growth of intriguing 2D and 1D tellurides, showcasing the potential of machine learning in guiding the synthesis of 1D nanostructures and opening up new opportunities for intelligent materials development.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Multidisciplinary
Vineeth Mohanan Parakkat, Gavin M. Macauley, Robert L. Stamps, Kannan M. Krishnan
Summary: This research demonstrates the tunability of the ground state for a hybrid artificial spin ice made of Fe nanomagnets, with three distinct magnetic textures identified by varying site-specific exchange-bias fields: a striped ferromagnetic phase, an antiferromagnetic phase achievable through external field protocols, and an unconventional ground state with magnetically charged pairs embedded in an antiferromagnetic matrix. Monte Carlo simulations support the results of field protocols and show that pinning tunes relaxation timescales and critical behavior.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Youngmin Kim, Simone Assali, Hyo-Jun Joo, Sebastian Koelling, Melvina Chen, Lu Luo, Xuncheng Shi, Daniel Burt, Zoran Ikonic, Donguk Nam, Oussama Moutanabbir
Summary: This study presents an experimental observation of enhanced photoluminescence from a single Ge/GeSn core/shell nanowire, demonstrating the potential to achieve strong cavity effects in group-IV nanowires. and provides new possibilities for on-chip light sources in the short-wave infrared range.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Sander. G. G. Schellingerhout, Roberto Bergamaschini, Marcel. A. A. Verheijen, Francesco Montalenti, Leo Miglio, Erik P. A. M. Bakkers
Summary: Selective area growth of Pb1-xSnxTe islands and nanowires is demonstrated, and their in-depth growth dynamics and faceting are analyzed. The material is confirmed to be single-crystalline and defect-free, with homogeneous Pb/Sn ratio in the nanowires. {110} directions are identified as the optimal candidate for the growth of high-quality and straight Pb1-xSnxTe nanowires, enabling the design of complex networks.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ali Frotanpour, Justin Woods, Barry Farmer, Amrit P. Kaphle, J. Todd Hastings, Lance E. DeLong
Summary: The angular dependence of ferromagnetic resonance (FMR) spectra for Fibonacci-distorted, kagome artificial spin ice has been measured, showing that the number of strong modes and discontinuities in the FMR field-frequency dispersion curves depend on the orientation of the applied DC magnetic field. These results suggest that the orientation of the applied magnetic field and severity of Fibonacci distortion serve as control variables for FMR modes and multistep reversal in future magnonic devices and magnetic switching systems.
Article
Chemistry, Multidisciplinary
Nian Jiang, Saptarsi Ghosh, Martin Frentrup, Simon M. Fairclough, Kagiso Loeto, Gunnar Kusch, Rachel A. Oliver, Hannah J. Joyce
Summary: Understanding the growth mechanisms of III-nitride nanowires is crucial for harnessing their full potential. A systematic study explores the growth of silane-assisted GaN nanowires on c-sapphire substrates, investigating the surface evolution of the substrates during annealing, nitridation, and nucleation steps. Both Ga-polar and N-polar GaN nanowires were grown, with N-polar nanowires exhibiting faster growth. The presence of protuberance structures and ring-like features in N-polar GaN nanowires suggests energetically favorable nucleation sites at inversion domain boundaries, while the impact on device performance is confined to the protuberance structure area.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Ziyuan Li, Zahra Azimi, Zhe Li, Yang Yu, Longsibo Huang, Weiqi Jin, Hark Hoe Tan, Chennupati Jagadish, Jennifer Wong-Leung, Lan Fu
Summary: In this study, efficient photodetection of light from near-infrared to mid-wave infrared was achieved by engineering InAs nanowire arrays. By optimizing the nanowire growth temperature and V/III ratio, a high wurtzite density of about 67% was obtained in the nanowire arrays. Due to the formation of a p-n junction, the nanowire arrays exhibited an ultrawide room-temperature photoresponse ranging from 500 to 3500 nm under zero bias. The nanowire arrays also showed high responsivity and detectivity at a relatively high operating temperature of 150 K. This research demonstrates the potential of InAs nanowire arrays for the development of high-performance ultra-broadband infrared photodetectors for wavelengths ranging from NIR to MWIR.
Article
Veterinary Sciences
Holly M. M. Vickery, Rachael A. A. Neal, Sokratis Stergiadis, Rebecca K. K. Meagher
Summary: Most dairy goat farms rear kids on ad libitum milk replacer, but solid feed intakes are problematic. The study investigated different weaning methods and found that gradual weaning with two 3.5-hour blocks of milk removal had the highest average daily gain (ADG) during the weaning period. However, abrupt weaning had the highest ADG post-weaning.
FRONTIERS IN VETERINARY SCIENCE
(2023)